专利名称：Optical slit
发明人：BRIAN JOHN EDWARD SMITH,ANDREW
MARK WOOLFREY
申请号：AU2002253287申请日：20020408公开号：AU2002253287A1公开日：20021021
摘要：An optical slit comprises two blades (40, 42) which define a slit between them,each blade being independently movable. This enables both the slit position and the slitwidth to be adjusted. The slit may be aligned with the centre of a light beam by aimingthe light beam at a detector, traversing at least one edge of the slit across the beampath, measuring the intensity of transmitted light at the detector for each position of theslit, and feeding back a signal which adjusts the slit position for maximum light
throughput. The width on the optical slit may be selected by placing the slit in the pathof the light beam and measuring the light transmitted at the detector, calculating theprcentage of light transmitted for that slit width and feeding back a signal which adjustsslit width to obtain the desired amount of light throughput.
申请人：RENISHAW PLC
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